Typewriting machine



Jan. 22, 1929.

A. G. F. 'KUROWSKI TYPEWRITING MACHINE Filed April 26, 1924 AfforneyPatented Jan. 22, 1929.

UNITEE STATES PATENT OFFICE.

ALFRED G. F. KUROW'SKI, OF BROOKLYN, NEW YORK,

.ASSIGNOR TO UNDERWOOD ELLIOTT FISHER COMPAN Y, OF NEW YORK, N. Y., .ACORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

Application filed April 26, 1924. Serial No. 709,109.

This invention relates to typewriting machines, with special referenceto combined paper-feeding and column-stop locking devices for thecarriages thereof.

In typewriting machines, particularly those of portable form, it isdesirable that the number of operating parts he as few, light in weightand simple in structure, as is consistent with durability and strength.

It is thus advantageous to redesign and rearrange certain parts thatperform a single necessary function, wherever possible, so as to performa double function, thus reducing the number of operating parts.

Ordinarily, a typewriting machineis provided with a paper-holding andpaper-feeding bar or roller, extending the length of the platen, abovethe line of print and supported by the carriage ends, the bar beingassociated with hangers, springs, raising means, ctc., used inconnection therewith, and for no other purpose.

t is also common to provide means for locking the column-stops, eitherindividually or grouped in operative relation on the stopbar, such meansusually consisting of a bar overhanging the entire range of stops, thisbar also necessitating the use of spring-pressed mounting elements, anda manual controlling device in maintaining the bar in operative orinoperative positions.

It is one of the obJeCts of this invention to substitute a singlestructure for the several independent elements above mentioned,performing the functions of both, and operated by a single manualmotion.

Another purpose is to materially reduce the number of parts employed,and further, in the simplification of the same, tending to economy inconstruction and weight reduction.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a transverse sectional view taken through the carriage andplaten of a typewriting machine. v a

Figure 2 is a top plan view of the same, the central portion beingbroken away.

Figure 3 is an enlarged fragmentary detail view, showing theconstruction of the feed roller end pivot and its mounting.

Figure 4: is a similar view, in section, of roller and arm-end support.

The typewriting machine illustrated includes a carriage having end frameplate members 5 formed of pressed sheet-metal with inreaching flangedupper edges to afford a finished appearance and necessary stiflness.

A platen 6 is mounted on the platen shaft 7 journaled in the carriageends 5 and provided on its extending end with a twirling .knob by whichthe platen may be rotated in either direction. 7

A paper-guide 8 is, pivotally mounted on the carriage base plate 9 andsupports afeed roller 10 at its front, held norinallyin peripheralcontact with the platen by springs 11.

The base plate 9 is formed with parallel runways co-operative withsimilar stationary interposed to provide an easy runnin carriage, whichso far as has been described is of standard construct-ion.

Near the rear of the carriage is a rock-shaft 14 having one end reducedto pivot in the right-hand carriage-end 5, and the opposite end suitedto receive an axial pivot-screw 15 threaded into the left-handcarriage-end.

On both ends of the rock-shaft 14:, adjacent the carriage ends, arerigidly secured arms 16 provided with lateral outstanding hubs held tothe shaft by pins 17, said arms and shaft forming a frame, swingablewithin the carriage.

The forwardly-extending ends 18 of these arms are bent at right anglestowards each other and in these bent portions are screwthreaded openingsreceptive of the shanks 19 of knurled knobs 20 disposed at the upperfront corners of the machine, convenient to an operator.

The straight portions of the arms 16, adjacent their bent ends, areformed with open ings suited to receive stepped bushings 22 permanentlyriveted therein, these bushings revolubly receiving the pintles 23 of afeed roller 24:, extending longitudinally of the platen and connectingthe arms 16, in which they are held by the stems 21. of the knobs- 20,these stems entering annular grooves 25 in the feedroller 24.. I

To provide an eifective biting surface 01 (i ll the feed roller, it maybe made of a rustless metal and slightly roughened, as by drawfiling,and the surface may be broken up into sections by shallow grooves asshown at 26 in Figure 3.

The rear ends of the arms 16 have set in them fixed studs 27 parallelwith the rock shaft 1e and provided with heads, and on which are mountedrollers 28 projecting laterally outward below the flanged upper edges ofthe carriage ends 5 by which they are partially obscured.

(Jo-operating with these rollers are flat springs 29 fixed to lugs 30 atthe lower edge of the carriage-ends by screws 31. The tension of thesprings 29, pressing against the rollers 28, co-acts with the weight ofthe frame to force the teed-roller 2e into contactwith the .platen, butwhen the feed roller is raised to the position shown by the'lorokenlines in Figure 1, the springs bearing against the rollers 28, which, asindicated, have passed below the axis of the rock-shaft 14, will carrythe arms 16 to a stop position against the tie-rod 32.

A column-stop bar 33 is permanently secured to the carriage-ends 5 andprovided with the usual form of rack teeth designed to receive betweenthem a plurality of columnstops 34.

To co-operate with these column-stops, which move with the platen, acarriage stop 35 is pivotally mounted, as at 36, to a stationary part ofthe machine, and may be moved into the path of the column-stops 34!: bya connection 37 to the tabulating key at the keyboard.

The rock-shaft 14 is flattened along one side, as at 38, for a distanceat least equal to the operative length of the stop-bar 33, and when therock-shaft and feed roller 24: are in the position shown in full linesin Figure 1, it will be seen that it is impossible to remove thecolumn-stops 34: from the stop-bar 33, due to the interference of therock-shaft 14:, but when the rock-shaft, arms'16 and feed roller 24 areraised to the position shown by the broken lines in the same figure, thefiat face 38 oil the rock-bar assumes a position parallel and slightlyspaced from the adjacent edges of the column-stops 34E, permitting themto be readily removed from their support bar 38.

The feed roller 24: is an essential element in promoting properfeedingoi a work-sheet above the printing line, and were this roller usedalone, it would still be necessary to sup port it on arms pivoted insome manner to the carriage-ends.

It the rock-shaft were employed merely to lockthe column-stops inoperative position on their support bar, the rock-shaft would, likewise,have hearings in the carriage-ends, and means must be provided to rotateit into its two operative positions.

However, combining. these two separate functions as by locating therock-shaft 14 in such position relative to the stops 34, as to interferewith their removal from the stopbar 33, except when moved to a releasedposition, dispenses with many parts that would necessarily be employedwere the rock-shaft and feed roller mounted for independent control,such arrangement being herein disclosed.

Variations may be resorted to within the scopeot the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

l. The combination with a typwriting ma chine carriage having acolumn-stop-bar and a plurality of stops engageable thereon, of arock-shaft pivoted between the carriage ends and having a flattened sidepermitting removal or engagement of said stops relative to the stop-barwhen disposed in a plane parallel thereto and locking the stops when inanother position, and means for rotating said rock-shaft into eitherposition.

2. The combination with a typewriting machine carriage having acolumn-stop-bar and a plurality of stops engageable thereon, of arock-shaft pivoted between the carriage ends, said rocl-z-shatt beingflattened along one side to allow adjustment of the stops on saidstop-bar when the flattened portion is parallel to their edges andlocking the stops when said rock-shaft is in another position, means forrotating said rock-shaft into releasing or looking position, and meansfor maintaining the rock-shaft in either position automatically.

3. The combination with a typewriting machine carriage having acolumn-stop-bar and a plurality of stops engageable thereon, of arock-shaft pivoted betwen the carriage ends, said rock-shaft beingflattened along one side to allow adjustment of the stops on saidstopbar when the flattened portion is parallel to their edges andlocking'the stops when said rock-shattis in another position, means forrotating said, rock-shaft into locking or unlocking position, resilientmeans tor maintaining the rock-shaft in either position, and a fixedstop locating the rock-shaft when in unlocking position.

l. In a typewriting machine, the combination with a platen, acolumn-stop support and a plurality of stops ustable therealong, ofreleasable feed-r0]ler-carrying means effective to lock said stops whenthe feed-roller is in position against the platen and topermitadjustment of said stops when. the feed-roller is released fromthe platen.

5. The combination with a typewriting machine carriage having acolumn-stop-bar and a plurality of stops engageable thereon, of arock-shaft pivoted between the carriage ends, said rock-shaft beingshaped in crosssection to release or retain said stops relative to thestop-bar in accordance with its position, arms fixed on said rock-shaft,rollers pivoted on said arms, and springs on said carriage impinging'onsaid rollers whereby said arms are maintained in either of two positionscorresponding to the releasing or retaining positions of saidroeleshaft.

In a typewriting machine, the combination with a platen, a column-stopsupport and a plurality of stops adjustable therealong, of releasablefeed-roller-carrying means effective to lock said stops when thefeed-roller is in one position and to permit adjustment of said stopswhen the feed-roller is in another position. 7. The combination with atypewriting machine carriage having a column-stop-bar and a plurality ofstops engageable thereon, of a rock-shaft pivoted between the carriageends, said rock-shaft being flattened along one side to allow adjustmentof the stops on said stop-bar when the flattened portion is parallel totheir edges and locking the stops when said rock-shaft is in anotherposition, means for rotating said rock-shaft into releasing or lockingposition, arms on said rockshaft, rollers at the ends of said arms, theaxis of said rollers being parallel with said rock-shaft, and resilientmeans pressing againstv said rollers whereby their axes are yieldablymaintained above or below the plane of the axis of said rock-shaft, saidrock-shaft bein held in its adjusted position thereby.

8. The combination with a typewriting machine carriage having a platen,a columnstop-bar and a plurality of stops removably engageable thereon,of a rock-shaft pivoted at its endsbetween the carriage ends, saidrock-shaft havinga flattened side Coincident with the operative lengthof said stop-bar adjacently parallel thereto, said flattened sidepermitting removal or attachment of the stops relative to the stop-barwhen disposed in a plane parallel thereto and lockin said stops When. inanother position, arms rigidly fixed to said rock-shaft, apaper-feed-roller carried by the arms and normally positioned againstthe platen, and resilient elements on said carriage operative tomaintain said arms in either raised or lowered position whereby saidrock-shaft locks or unlocks the stops on said stop-bar.

9. The combination with a typewriting machine carriage having a platen,a columnstop-bar and a plurality of stops removably engageable thereon,of a rock-shaft pivoted at its ends between the carriage ends, saidrock-shaft having a flattened side coincident with the operative lengthof said stop-bar adjacently parallel thereto, said flattened sidepermitting removal of attachment of the stops relative to the stop-barwhen disposed in a plane parallel thereto and locking said stops when inanother position, arms rigidly fixed to said lock-shaft, said armsextending at its ends between the carriage to the front and rear of thecarriage, resilient elements 'on said carriage co-operating with therearward extensions of said arms to main tain said rock-shaft in eitherof two definite positions, and a paper-feed-roller carried between theforward extensions of said. arms to impinge upon said platen.

10. The combination with a typewriting machine carriage having a platen,a columnstop-bar and a plurality of stops-removably engageable thereon,ofa rock-shaft pivoted 7 ends, said rock-shaft having a flattenedsidecoincident with the operative lengtlrof said stop-bar adjacentlyparallel thereto, said flattened side permitting removal or attachmentof the stops relative to the stop-bar when disposed in a plane parallelthereto and locking said stops when in'another position, arms fixed tosaid rock-shaft near the ends thereof to extend towards the front andrear of the carriage, a paper-feedroller pivotally mounted in theforward ends of said'arms, parallel with the axis of said platen, andmeans cooperative with the rear ends of said arms normally forcing saidroller into operative contact withsaid platen.

M11. The combination'wi'th a typewriting machine carriage having aplaten, a columnstopbar'and a plurality of stops reinovably engageablethereon, of a rock-shaft pivoted at its ends between the carriage ends,said rock-shaft having a flattened side coincident with the operativelengthof said stop-bar adjace'ntly parallel thereto, said flattened sidepermitting removal or attachment of the stops relative'to the stop-barwhen disposed in a plane parallel'thereto andlocklng said stopswheninanother position, arms fixed to said rock-shaft near the ends thereof toextend towards the front and rear of the carriage, a paper-feed-rollerpivotally iounte'd in the forward ends of said arms parallel with theaxis of said platen, means for releasing said roller, said releasingmeans also being operative in manually raising said arms, resilientmeans for normally pressing said roller into engagement with saidplaten, said resilient means also yieldably retaining said arms when inraised position, and a stop for limiting the upward movement of saidarms.

12. The combination with a itypewriting machine carriage having aplaten, a columnstop-bar and a plurality of stops removably engageablethereon, of a rock-shaft pivoted at its ends between the carriage ends,said rock-shaft having a flattened side coincident with the operativelength of said stop-bar adjacently parallel thereto, said flattened sidepermitting removal or attachment of the stops relative to the stop-barwhen disposed in a plane parallel thereto and locking said stops when inanother position, arms fixed to said rock-shaft near the ends thereof toextend towards the front and. rear of the carriage, a paper-feed--rollerpivotally mounted in the forward ends of said arms, said roller havingannular recesses adjacent its ends, detents carried by said armsremovably engaging in the recesses, said detents having extendingmanually operable knobs, a stop. fixed in said carriage limiting theupward movement of said arms, and resilient means for holding said armsin either of their extreme positions.

13. The combination with a typewriting machine carriage having a platen,of a rockshaft journaled in the carriage ends, arms fixed on saidrock-shaft extending to the front and rear of the carriage, saidarmshaving inreaching forward ends, a paper-feedroller having pintlesjournaled in the for ward portions of said arms and being in normalcontact with said platen, said roller having annular recesses near itsends and pre senting a broken surface, handle-knobs removably engaged inthe inreachi-ng ends of said arms, said knobs having stems engageable inthe mentioned annular recesses, rollers pivoted on the rear ends of saidarms, and spring elements fixed on saidcarriage exerting pressure onsaid rollers normally stressingsaid arms and causing tensionalengagement of said feed-roller with said platen.

14. In a typewriting machine, the combination with acolumn-stop-rock-bar and a plurality of stops removably adjustabletherealong, of releasable feed-roller-carrying means including arock-shaft extending parallel with and adjacent the stops, saidrock-shaft being shaped in cross-section to block the stops againstremoval when the feed-roller is in one position and to permit removal ofthe stops when said feed-roller is in another position.

15. In a typewriting machine, the combination with a platen, of apaper-feed-roller, arms for swinging the roller toward or away from theplaten, the free ends of said arms including journals for the roller,the latter having annular recesses adjacent the. journals, andfinger-pieces carried bysaid arms, said finger-pieces including detentsremovably engaging the recesses within the journals.

16. In a typewriting machine, nation with a carriage having a platen, acolumn-stop-bar and a series of column-stops loosely settherealong, of afeed-roller tohear against the surface of the platen, a frame carried bythe carriage to support the feedroller in engagement with the platen,and means mounted on said frame to prevent the removal of thecolumn-stops from the column-stopbar.

17. In a typewriting machine, the combination with a carriage having aplaten, a column-stop-bar and a series of column-stops loosely settherealong, of a feed-roller to bear against the surface of the platen,and a frame movable within the carriage and operable at one positiontl'rereof' to support the feedroller against the platen and having meansmounted thereon to prevent displacement of the column-stops when in suchposition and operable at another position thereof to provide for therelease of the feed-roller from the platen and arrange said means in amanner to. permit the release of the column-stops from the stop-bar.

18. In a typewriting machine, the combination with a carriage having aplaten, a column-stop-bar and a series of column-stops loosely settherealong, of a frame supported by said carriage, a feed-rollerrotatably mounted at the forward end of said frame, said frame beingmovable to cause engagement of said roller with said platen or sepaati0ntherefrom, and locking means asso; ciated with said frame and movableupon movement of the latter to lock the stops on said bar when theroller is moved to operative position and to release said stops when theroller is moved to inoperative position.

ALFRED G. F. KUROW'SKI.

to hold the rollerthe combi-

